US 12,116,049 B2
Rack-driven power assisted steering device
Hyeon Su Kim, Yongin-si (KR)
Assigned to HL MANDO CORPORATION, Pyeongtaek-si (KR)
Appl. No. 17/610,941
Filed by HL MANDO CORPORATION, Pyeongtaek-si (KR)
PCT Filed May 14, 2020, PCT No. PCT/KR2020/006361
§ 371(c)(1), (2) Date Nov. 12, 2021,
PCT Pub. No. WO2020/235864, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 10-2019-0059893 (KR), filed on May 22, 2019.
Prior Publication US 2022/0242476 A1, Aug. 4, 2022
Int. Cl. B62D 5/04 (2006.01)
CPC B62D 5/0448 (2013.01) [B62D 5/0424 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A rack-driven power assisted steering apparatus comprising:
a ball nut that
includes a support portion having a first protrusion protruding from an outer circumferential surface of the ball nut, and
supports a first rolling member through one side surface, and a second rolling member through the other side surface, of the first protrusion in an axial direction;
a first support member disposed between an inner circumferential surface of a housing and the first rolling member; and
a second support member separate from the first support member and disposed between the inner circumferential surface of the housing and the second rolling member,
wherein
one of the first support member and the second support member is supported in the axial direction by the housing, and the other of the first support member and the second support member is supported in the axial direction by a lock screw coupled to the housing, and
a first elastic member supported in the axial direction is disposed at a first location between the lock screw and one of the first support member and the second support member and is in contact with the lock screw.